Samuel maxfield



(No Model.)

S. MAXPIELD.

IMPLEMENT FOR REOOVERING LOST PIPE FROM TUBULAR WELLS. No. 424,612.Patented Apr. 1, 1890.

INVENTOR Samuel UNITED STATES PATENT OFFICE.

SAMUEL WAXFIELD, OF ANGOLA, INDIANA, ASSIGNOR OF ONE-HALF TO CYRUSCLINE, OF SAME PLACE.

IMPLEMENT FOR RECOVERING LOST PIPE FROM TUBULAR WELLS.

SPECIFICATION forming part of Letters Patent No. 424,612, dated April 1,1890.

Application filed August 26, 1889. Serial No. 822,063. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL MAXFIELD, residing at Angola, in the countyof Steuben and State of Indiana, and being a citizen of the UnitedStates, have invented a new and useful Improvement for the Purpose ofRecovering Lost or Hidden Pipe from Tubular Veils, of which thefollowing is a specification.

The invention relates to a pipe-grip and aims to effect the followingobjects: first, to apply a lifting-power to the lost or broken pipe insuch a manner that the force used in drawing the same shall be in a linewith the center of the pipe; second, to fasten or loosen the grip at anypoint inside the lost, broken, or hidden pipe; third, to apply the sameforce extended for securing the grip to the 10st, broken, or hidden pipeand drawing the same for disengaging the grip from said pipe. I attainthese objects by the mechanism illustrated in the attached drawings, inwhich- Figure l is a vertical section, parts being broken away, of thepipe grip, showing it attached to lost, broken, or hidden pipe underground. Fig. 2 is a perspective view of the gripping-jaws detached. Fig.3 is a perspective view of the jaw-expanding device.

The double steel spring-jaws a a clasp over the body of the harpoon C,the two small lugs d d fitting into the slots H H of the doublespring-jaws a a, the object being to keep the springs ad from shiftingfrom side to side and to prevent the springs a a from slipping off theharpoon C in case the pipe should split in attempting to remove it.

. The double spring co a is widened at the open ends, so thatthe lappingedges B B nearly encircle the harpoon O at the shoulder E E, the purposebeing to better retain the springs a a in position and also to give alarger attaching-surface to the lost or hidden pipe, as shown in Fig. 1,the lapping edges B B and the tops of the double springs a a. beingserrated externally, so that they will readily attach to the pipe andprevent slipping. The shoulder E E of the harpoon O, as shown in Fig. 3,fits down closely upon the edges B B and top of springs a a when readyto be applied, the purpose being to form a point of contact, so thatforce applied to the rod or pipe attached to the harpoon at G will besuddenly communicated to the springs (I. a at B B and cause the springsa a suddenly to separate or expand and start downward along the sides ofthe harpoon C until they come in contact with the sides of the lost orhidden pipe 0 o, as shown in Fig.1. The wedge of the harpoon C should beone-third the length of the harpoon C to the shoulder E E, and theharpoon 0 should be so narrowed in its construction from the points (Z(Z toward the shoulder E E and the double springs a a so thickened inconstruction from a point on the springs to a corresponding to thepoints (1 (Z and the harpoon 0 toward the end of the double springs to ato the points 13 B that at any point along the body of the harpoon Othat the springs to a may be placed the harpoon C will exactly fit thesprings a a. The springs a a should have simply clasping-powersufficient to hold them in place along the harpoon G.

The manner of operating the grip is as follows: Introduce the grip intothe lost or hidden pipe to the proper distance, first having attachedthe necessary extension at the point G of the harpoon G. Hold themachine and extension suspended and strike a blow with an ordinaryhammer 011 the end of the extension sufficiently strong to drive thesprings a a downward until they come in contact with the sides of thepipe 0 o, as shown in Fig. 1, after which levers or screws may beapplied for the purpose of raising the pipe.

The grip may be attached to the lost or hidden pipe in another manner-t0wit, by suspending in the grip the lost or hidden pipe and drawing upquickly on the harpoon, which will cause the jaws a a to separate andgrip the sides of the pipe.

The machine may be loosened from the sides 0 0, as in Fig. 1, in exactlythe same manner as it was made fast. A stroke upon the end of theextension-rod will drive the harpoon 0 back between springs to a, andthe machine can be withdrawn or the action of the jaws may be reversedand the springs loosened and the same end accomplished.

Having thus described my invention, whatI claim, and desire to secure byLetters Patent, 1s-

1. A pipe-grip comprising the double spring jaws ad, having the ends ofthe jaws widened their upper ends, said ends being expanded 10 at B Band externally serrated and having at B B and externally serrated, andthe harslots H H therein, and the harpoon having poon having shoulder EE and lugs 01 d, the lugs d d, which are inserted in the slots H latterentering the said slots H H, substan- H, and having shoulder E E,substantially as tially as set forth.

and for the purpose described. SAMUEL MAXFIELD.

2. The hereinbeforespecified pipegrip, Witnesses:

comprising the double spring-jaws aa, which GEO. E. YOUNG,

have slots H H and which are thickened at JESSE H. CARPENTER.

